They must be fuming in Dublin Castle where the Revenue Commissioners have their head office. They had all the hard work done. A system to tax the value of people's homes had been devised and implemented in double quick time. From the get go, Local Property Tax compliance rates were higher than anyone could reasonably have expected, and the tax was flowing in. Then an awkwardly-worded letter put the tax, its method of operation and the Revenue chairman in front of an Oireachtas committee. What went wrong?